Hollywood bands together to help the people of Haiti Friday night for the George Clooney-organized Hope for Haiti Now telethon, airing on most major networks — including NBC, ABC, CBS, CNN and MTV — at 8 p.m./ET.

Clooney will anchor the telethon from Los Angeles, Wyclef Jean in New York City and CNN's Anderson Cooper will report live from Haiti, the island nation rocked by a massive 7.0 earthquake Jan. 19. Proceeds from the two-hour event, featuring performances from Christina Aguilera, Justin Timberlake and Taylor Swift, will benefit The Clinton Bush Haiti Fund, United Nations World Food Programme, Oxfam America, Partners in Health, the Red Cross, UNICEF and Yele Haiti.

Also airing this weekend is Saturday's Screen Actors Guild Awards, which honor the best in 2009 film and television programming. Fresh from their wins at last weekend's Golden Globes, Meryl Streep and Mo'Nique will hand out trophies live on TNT and TBS.

The fun college drama Greek heads back to ABC Family Monday night with an eventful winter return at 10 p.m. Worried that they burned down a rival sorority house, Casey (Spencer Grammer) and her ZBZ sisters vow to keep mum. Says Us' John Griffiths of the hour-long episode, "Laughs are aplenty and Greek's savvy way with relationships — gay included! — ultimately makes it worth pledging."

On Tuesday, Gordon Ramsay's Kitchen Nightmares returns for a second season, and Griffiths raves that the brooding Brit chef is back on his game in the kitchen "as if he's Superman." Urging Philadelphia's Hot Potato Cafe to stop serving three-week-old frozen food and get out of serious debt, "Ramsay [is] a hero. He gets the ladies to serve smaller portions and, in a touching moment, encourages one to dry her eyes and grow up. If only ever restauranteur had his chops."